Dark grey coat, with a ragged black mane. Red eyes.
A light grey four pointed star inside a black six pointed star.
Shy and more learned than your average pony, but absolutely brutal when she shows her dark side.
No pony knows where she came from. She seemed to just appear in Equestria out of nowhere. She grew up around pain and suffering. When she came to Equestria, she thought everyone should feel pain and suffering. That is what started the Plague of Stone.